JPH024954Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" (Field of industrial application) The present invention relates to a metal unit plate used in assembling a storage tank.

(Conventional unit plate) FIG. 5 is a perspective view showing a conventional unit plate 1. As shown in FIG. The unit plate 1 is made of a metal plate such as stainless steel, and has a joint part 3 bent around the entire circumference of a square or rectangular plate body 2. The joint portion 3 has a substantially perpendicular intersecting relationship with the disk body 2, and a plurality of fastening holes 4, 4, . . . are bored at predetermined intervals on its longitudinal surface. It had been. Therefore, as shown in FIG. 6, the storage tank 5 is assembled by connecting a plurality of unit plates 1 through their joints 3.

(Problem to be solved by the invention) The unit plate 1 made of metal is different from that made of FRP,
Its wall thickness is only about 1.5 to 5 mm (in the case of FRP unit plates, the wall thickness is usually about 5 to 10 mm). Therefore, by inserting the bolts 7, 7, . . . into the fastening holes 4, 4, . . . as shown in FIG. 6 into the respective fastening holes 4, 4, . As shown in the figure, the packing 6 interposed between the joints 3, 3 is locally compressed around the fastening hole 4, so that the joint 3 is curved between the fastening holes 4, 4,... I was getting used to it. Needless to say, such a curved deformation of the joint portion 3 causes leakage of the liquid stored inside the storage tank 5. Conventionally, in order to prevent curved deformation of the joint 3, a metal band plate (not shown) is attached to the joint 3 and reinforced by tightening or welding together with bolts 7. However, this increases the weight of the unit plate 1, making handling such as transportation and storage tank assembly difficult.

The present invention was developed in view of the above circumstances, and the joints are strongly reinforced within a weight range that does not make handling difficult, and the mutual connection of unit plates prevents leakage of stored liquid. The object of the present invention is to provide a new unit plate for an assembly type storage tank.

"Structure of the invention" (Means for solving the problem) The gist of the proposed unit plate is that joints for interconnection are formed by bending around the entire circumference of a rectangular plate made of a metal plate. In the unit plate for an assembled type storage tank, a reinforcing rib is provided at the tip of the joint except for the corner portions at both ends, and the reinforcing rib is once extended from the tip of the joint toward the center of the board. After being bent toward the front, it is further bent toward the surface of the disc body or the inner surface of the joint.

(Function) Since the joint is strongly reinforced by the reinforcing ribs provided at its tip, the joint is prevented from being bent or deformed even if the bolts are tightened in each fastening hole. Furthermore, the reinforcing rib is formed by bending the protruding end of the joint part twice or more, in the direction of the center of the disc body and in the direction towards the surface of the disc body or the inner surface of the joint part. . Therefore, when handling the unit plate, it is possible to prevent the hands from being injured by the edge portions of the reinforcing ribs. Furthermore, the reinforcing ribs are
Since it is not provided at the corners of both ends of the joint,
This prevents rainwater from accumulating inside the bends of the reinforcing ribs, thereby preventing the occurrence of rust.

(Example) Hereinafter, the present invention will be explained based on the drawings showing the example.

FIG. 1 is a partially cutaway perspective view showing the unit plate of the present invention. In the proposed unit plate, joint parts 9, 9, ... are bent on the entire circumference of a square or rectangular board 8, and a reinforcing rib 11 is provided at the tip end 9a of the joint part 9. It is made up of The joint portion 9 also has a plurality of fastening holes 1 along its longitudinal surface.
0, 10, . . . are drilled at predetermined intervals.

FIG. 2 is an enlarged side sectional view showing the joint portion 9. As shown in FIG. The reinforcing rib 11 provided at the tip 9a of the joint 9 is formed by further bending the metal plate forming the disk body 8 and the joint 9. It is. Therefore, the disk body 8, the joint portion 9, and the reinforcing rib 11 are integrally formed with each other. The reinforcing rib 11 is connected to the joint portion 9
In order to most effectively reinforce against the curved deformation in the longitudinal direction, the width dimension h (the bending length from the joint portion 9) is formed to be large. That is, since the bending stress σ acting along the longitudinal direction of the joint 9 is σ=M/Z (M is the bending moment), this σ is the section modulus of the main part of the joint 9 Z=bh ² The larger /6 becomes, the smaller it becomes inversely proportional. Therefore,
The joint portion 9 will have an increased resistance to an external force that tends to cause a curved deformation, and will become difficult to curve.

In addition, as shown in FIG. 1, the reinforcing rib 11
Both ends of the joint portion 9 are cut out at the corner portion formed between the joint portion 9 and the adjacent joint portion 9 positioned in an intersecting relationship. This is a measure to prevent misalignment of the reinforcing ribs 11 at the abutted portions when the reinforcing ribs 11 are bent from the protruding end 9a of the joint portion 9. In addition, this notch also has the function of draining rainwater that tends to accumulate inside the bent portion of the reinforcing rib 11, so that rusting of the board 8 and joints 9 is prevented, and mosquitoes etc. It can also prevent the occurrence of pests.

By the way, if it is sufficient to simply reinforce the joint portion 9, the reinforcing rib 11 may be one in which the tip of the joint portion 9 is simply bent toward the center of the disk body 8. However, if this is done, there is a risk of injury to hands or the like at the edge portions of the reinforcing ribs 11 when handling the unit plates or when assembling the storage tank. Therefore, in the present invention, the reinforcing rib 11 is bent from the protruding end 9a of the joint part 9 toward the center of the disc body 8, and then further bent from the surface of the disc body 8 to the inner surface of the joint part 9. It should be bent so that it points towards. Therefore, when handling the merits unit board,
There is no risk of injury to the worker's hands.

(Study of another aspect) FIG. 3 shows the bending structure of the reinforcing rib 11,
FIG. 3 is a side sectional view of an embodiment in which the cross-sectional shape is formed to be rounded as a whole. That is, the reinforcing rib 11 of this embodiment
After bending from the center toward the center of the disc body 8, the direction is changed smoothly and continuously over three times, so that it is then bent toward the surface of the disc body 8 and then toward the inner surface of the joint portion 9. In this way, handling of the unit board becomes even safer.

FIG. 4 is a side sectional view showing still another embodiment of the bending structure of the reinforcing ribs 11. In this embodiment, the reinforcing ribs 11 are folded back so as to be close to and parallel to the inner surface of the joint portion 9. Therefore, the width h of the reinforcing rib 11 is smaller than that of the reinforcing rib 11 shown in FIGS. Since it has a section modulus several times larger than that of (see reference numeral 3), it can sufficiently cope with curved deformation during bolt fastening. In this way, the configuration and shape of the unit plate of the present invention can be changed as appropriate depending on the embodiment.

"Effects of the invention" As is clear from the above explanation, according to the assembly type storage tank unit plate according to the invention, the joints are strongly reinforced by reinforcing ribs, so bolts etc. cannot be tightened. There is no risk of causing curved deformation.
Therefore, the internal liquid stored in the storage tank will not leak. Furthermore, the reinforcing ribs are bent in such a way that an operator will not be injured even if they are touched with bare hands, so the unit plate of the present invention can be handled safely. Furthermore, since the joint has a structure in which cutouts are provided at both ends of the joint to prevent adjacent reinforcing ribs from being continuous, there is no risk of rainwater accumulating inside the bends of the reinforcing ribs, thereby preventing rust. It is possible to prevent the occurrence of insects and pests. Of course, since the reinforcing ribs are provided only at the protruding ends of the joints, they do not become too heavy, and the proposed unit plate does not become difficult to handle, among other advantages. have.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing the proposed unit plate, Fig. 2 is an enlarged side sectional view showing the state in which reinforcing ribs are provided in the proposed unit plate, and Figs. 3 and 4 are different aspects respectively. Fig. 5 is a perspective view showing a conventional unit plate, Fig. 6 is a perspective view showing a storage tank assembled by conventional unit plates, and Fig. 7 is a conventional unit plate. FIG. 3 is a front view showing a situation in which a curved deformation occurs. 5... Conventional assembly type storage tank, 8... Panel body, 9...
Joint portion, 9a... Tip end, 10... Fastening hole, 11
...Reinforced ribs.

Claims (1)

[Scope of utility model registration request] In a unit plate for a prefabricated storage tank, in which a joint part for interconnection is bent around the entire circumference of a rectangular board made of a metal plate, the tip of the joint part has corner parts at both ends. Reinforcement ribs are provided except for
A unit for an assembled storage tank, characterized in that the reinforcing rib is once bent from the tip of the joint toward the center of the disk, and then further bent toward the surface of the disk or the inner surface of the joint. Board.